<html>
    <head>
        <meta charset="utf-8" />
    </head>
    <style>
        * {
            margin: 5;
            padding: 0;
        }
    
        body {
            width: 200px;
            height: 100px;
        }
    
        .btn {
            width: 80px;
        }
    
        .div {
            text-align: center;
        }
    
        span {
            color: red;
        }
    </style>
    <body style='display:none;'>
        <div>预约科目：<select id="km"><option value="">-请选择-</option><option value="0">科目二</option><option value="1">科目三</option></select></div>
        <!-- <div>预约课时：<select id="ks">option value="">-请选择-</option><option value="1,2,3,">8:00-10:15</option><option value="4,">10:15-11:00</option><option value="5,">11:00-11:45</option><option value="6,7,8,">13:00-15:15</option>option value="9,">15:15-16:00</option><option value="10,">16:00-16:45</option></select></div> -->
        <div>预约课时：<select id="ks"><option value="">-请选择-</option><option value="1,2,3,">8:00-10:15</option><option value="4,5,">10:15-11:45</option><option value="6,7,8,">13:00-15:15</option><option value="9,10,">15:15-16:45</option></select></div>
        <div>刷新间隔：<input type='text' style='width:50px;' id='timer' value="1" />&nbsp;&nbsp;秒</div>
        <div class='div'>
            <span id='msg'></span>
            <div class='div'>
                <input type="button" class='btn' value="保存" id="btnSave" />
            </div>
        </div>
    </body>
    </html>
    
    <script src="js/jquery-3.1.1.min.js"></script>
    <script src="js/popup.js"></script>